Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/54479
Título: Diferentes abordagens no estudo da ecologia de peixes em uma cascata de reservatórios
Título(s) alternativo(s): Different approaches in the study of fish ecology in a reservoir cascade
Autores: Pompeu, Paulo dos Santos
Casarim, Ruanny
Loures, Raquel
Passamani, Marcelo
Palavras-chave: Hidroacústica
Dieta
Sazonalidade
Macroinvertebrados
Hydroacoustics
Diet
Seasonality
Macroinvertebrates
Data do documento: 5-Set-2022
Editor: Universidade Federal de Lavras
Citação: ANDRADE, A. L. V. Diferentes abordagens no estudo da ecologia de peixes em uma cascata de reservatórios. 2022. 54 p. Dissertação (Mestrado em Ecologia Aplicada) - Universidade Federal de Lavras, Lavras, 2022.
Resumo: The main hydrographic basins in Brazil are currently under the influence of dams from hydroelectric projects. The existence of a cascade of reservoirs can accentuate all types of impacts caused by the damming. In the case of fish, it is expected that, over time and space, the effect of reservoir cascades will be more pronounced from one reservoir to another. Here, we evaluated the diet of a non-native species, through analysis of stomach contents, and the fish size distribution, through hydroacoustics, over time and space in a cascade of reservoirs’ system. We saw that the diet of Knodus moenkhausii was influenced by the region in which it is found and, although the relationship with the abundance of food items was only marginally significant, the most abundant items also presented higher values of frequency of occurrence in the stomachs. With hydroacoustics, we saw that the largest fish are found in the most lotic or closest to lotic portions of the system, both in the Dry and Rainy seasons. Between seasons, we saw that the size of fish is greater in Rainy season in most regions and there is movement of fish, which is probably related to migratory species’ necessity to move upstream toward the lotic streches in the Rainy season.
URI: http://repositorio.ufla.br/jspui/handle/1/54479
Aparece nas coleções:Ecologia Aplicada - Mestrado (Dissertações)

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